Organic–inorganic metal halide (OIMH) glass offers the advantages of large-scale production, high transparency, and minimal light scattering. However, undesired crystallization in OIMH glass can occur, leading to deteriorated transparency. Herein, a series of bisphosphonium organic cations were designed to construct Mn-based metal halide crystals with a photoluminescence quantum yield (PLQY) near unity, alongside the development of highly thermally stable OIMH glasses. Two strategies were employed to lower the melting point of OIMH: alkyl chain elongation and fluorine substitution. The (Hex-3,4-2F)MnBr₄·MeOH (Hex-3,4-2F = hexane-1,6-diylbis((3,4-difluorobenzyl)diphenylphosphonium)) crystal delivers a glass transition temperature of 100 °C and the highest T_g/T_m ratio (0.82) among OIMHs. The resulting OIMH glass exhibits a PLQY of 47.6%, achieves an impressive resolution of 25 lp mm⁻¹ in X-ray imaging, and remains transparent even after being heated at 90 °C for six weeks. These bisphosphonium-based OIMH glasses present a feasible design for the practical application of OIMH glasses in radiation detection.

中文翻译：

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熔点可调的双磷阳离子基金属卤化物玻璃闪烁体


有机-无机金属卤化物（OIMH）玻璃具有大规模生产、高透明度和最小光散射的优点。然而，OIMH 玻璃可能会发生不希望的结晶，导致透明度下降。在此，设计了一系列双磷有机阳离子来构建光致发光量子产率（PLQY）接近一致的锰基金属卤化物晶体，同时开发了高度热稳定的OIMH玻璃。采用两种策略来降低 OIMH 的熔点：烷基链延长和氟取代。 (Hex-3,4-2F)MnBr ₄ ·MeOH (Hex-3,4-2F = 己烷-1,6-二基双((3,4-二氟苄基)二苯基鏻))晶体的玻璃化转变温度为 100 ° C 和 OIMH 中最高的T _g / T _m比率 (0.82)。所得 OIMH 玻璃的 PLQY 为 47.6%，在 X 射线成像中实现了令人印象深刻的 25 lp mm ^-1分辨率，并且即使在 90 °C 加热六周后仍保持透明。这些双磷基 OIMH 玻璃为 OIMH 玻璃在辐射检测中的实际应用提供了一种可行的设计。